CVE-2024-23838 TrueLayer.Client SSRF when fetching payment or payment provider
A malicious actor can manipulate the destination URL in the TrueLayer .NET SDK, causing requests to internal or external resources and leading to information disclosure.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-23838?
CVE-2024-23838 is a high-severity server-side request forgery vulnerability in truelayer-dotnet, published on 30 Jan 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
TrueLayer.NET is the .Net client for TrueLayer. The vulnerability could potentially allow a malicious actor to gain control over the destination URL of the HttpClient used in the API classes. For applications using the SDK, requests to unexpected resources on local networks or to the internet could be made which could lead to information disclosure. The issue can be mitigated by having strict egress rules limiting the destinations to which requests can be made, and applying strict validation to any user input passed to the `truelayer-dotnet` library. Versions of TrueLayer.Client `v1.6.0` and later are not affected.
Weakness: CWE-918
Which versions are affected by CVE-2024-23838?
2 open source packages ship an affected version, including TrueLayer.Client. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
TrueLayer.Client NuGet | All versions | 1.6.0 |
TrueLayer.Client NuGet | All versions | 1.6.0 |
Products include Truelayer Truelayer.net.
How do I fix CVE-2024-23838?
Upgrade TrueLayer.Client to 1.6.0 or later.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2024-23838 being exploited?
There is no known exploitation of CVE-2024-23838 in the wild and no public exploit code.
Sources
Also known as GHSA-67m4-qxp3-j6hh.